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Clean Water Act discharge permit · NPDES CA0079154

TRACY WWTP, Tracy, CA: NPDES CA0079154 discharge permit, effluent exceedances, inspections, penalties

TRACY WWTP, held by Tracy, City of, holds NPDES permit CA0079154, which discharges to Old River. EPA’s file records it issued December 8, 2017 and expiring January 31, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedTRACY WWTP
Permittee as filedTracy, City of
NPDES IDCA0079154
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedDecember 8, 2017
Expiration dateJanuary 31, 2023
AddressTracy, CA 95304
Receiving waterOld River
SubwatershedUpper Old River (HUC 180400030601)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant; the 60 with the most exceedances of 194 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Coliform, total general43028September 30, 202599,999% over the limit
Nitrogen, ammonia total [as N]348314August 31, 2025767% over the limit
Temperature, water deg. fahrenheit01311December 31, 2017304% over the limit
Oxygen, dissolved [DO]01211August 31, 201068% over the limit
Chlorine, total residual4128June 30, 202019,773% over the limit
Dichlorobromomethane6106July 31, 202352% over the limit
pH12192October 31, 2010
Dibromochloromethane682March 31, 201725% over the limit
Mercury, total recoverable472June 30, 201221,338% over the limit
Aluminum, total recoverable252September 30, 200817% over the limit
Solids, total suspended8991January 31, 20227% over the limit
Copper, total recoverable2111August 31, 2009186% over the limit
% Survival Flow Through 96Hr Acute Oncorhynchus mykiss871October 31, 201217% over the limit
Nitrogen, nitrate total [as N]271December 31, 20081% over the limit
Temperature Increase Deg. F211November 30, 20185% over the limit
BOD, 5-day, 20 deg. C8970
Flow, in conduit or thru treatment plant12160
Solids, total dissolved14150
Specific conductance10150
TU Static Renewal 7-Day Chronic Ceriodaphnia dubia8100
Methylmercury4100
Di[2-ethylhexyl] phthalate [DEHP]290
Nitrogen, nitrite total [as N]260
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)060
TU Static Renewal 7-Day Chronic Pimphales promelas060
Asbestos250
Diazinon + Chlorpyrifos840
%Surv Static Renewal 96Hr Oncorhynchus mykiss840
Lead, total recoverable240
.delta.-BHC240
Hardness, total [as CaCO3]430
Phosphorus, total [as P]230
Cyanide, total [as CN]230
Arsenic, total recoverable230
Selenium, total recoverable230
Thallium, total recoverable230
Beryllium, total recoverable [as Be]230
Nickel, total recoverable230
Silver total recoverable230
Zinc, total recoverable230
Cadmium, total recoverable230
Antimony, total recoverable230
2-Methyl-4,6-dinitrophenol230
Carbon tetrachloride230
1,2-Dichloroethane230
Toluene230
Benzene230
Acenaphthylene230
Acenaphthene230
Acrolein230
Acrylonitrile230
Anthracene230
Benzo[b]fluoranthene230
Benzo[k]fluoranthene230
Benzo[a]pyrene230
Bis[2-chloroethyl] ether230
Bis[2-chloroethoxy]methane230
Bis[2-chloroisopropyl] ether230
Butyl benzyl phthalate230
Chlorobenzene230

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES CA0079154.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, CA0079154.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID CA0079154 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.